President Donald Trump is seeking continued help from China's president in addressing the threat posed by North Korea's nuclear developments.

The Associated Press reports that Yun is the only USA diplomat in contact with representatives of the North Korean government.

Some legal experts are warning that since North Korea is not an imminent threat, that is to say there is no reason to believe North Korea is about to attack the United States, there exists no legal justification for preemptive action at all.

Beyond the bluster, the Trump administration has been quietly engaged in back channel diplomacy with North Korea for several months - addressing Americans imprisoned in the communist country and deteriorating relations between the long-time foes.

French President Emmanuel Macron has called on all sides in the North Korean nuclear crisis to act responsibly "to prevent any escalation of tensions" after a days-long war of words between Washington and Pyongyang.

Trump doubled down Thursday on his warning to North Korea.

Trump said that past administrations had not done enough to take on North Korea and that it is time a President "stuck up for the country".

Stoke City Premier League - 12 August 2017
He takes his side to Goodison hoping the fuss surrounding the 31-year-old's return could have a disruptive effect on Everton . Koeman says he will only be able to make a true assessment of his team after they complete their transfer business.

President Donald Trump has issued fresh threats of swift and forceful retaliation against nuclear North Korea, declaring the US military "locked and loaded" and warning that the communist country's leader "will regret it fast" if he takes any action against USA territories or allies.

The decision will not only take action against alleged Chinese violations of US companies' intellectual property rights, but could also be perceived as an attempt by the USA government to crank up the pressure on Beijing to rein in North Korea.

The man behind the documentary "An Inconvenient Sequel: Truth to Power" may not see eye-to-eye with Mr. Trump on environmental issues, but he told Newsweek for an interview published Friday that diplomatic crises over North Korea's nuclear weapons program is another story.

On Friday, he tweeted: "Military solutions are now fully in place, locked and loaded, should North Korea act unwisely".

The White House says Trump also told Xi he looked forward to seeing him in China later this year. Warmbier, 22, was held in North Korea for 17 months and returned to the U.S.in a coma.

He described the president's threatening language as being akin to telling North Korean leader Kim Jong-un, "Go ahead, kill everybody".

There, Yun learned about the health condition of Otto Warmbier, the young American who had gone to North Korea on a short trip, only to be arrested for allegedly stealing a poster.